EP1484031B1 - Procédé et dispositif pour la production d'une structure dentaire en céramique - Google Patents

Procédé et dispositif pour la production d'une structure dentaire en céramique Download PDF

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Publication number
EP1484031B1
EP1484031B1 EP04013333A EP04013333A EP1484031B1 EP 1484031 B1 EP1484031 B1 EP 1484031B1 EP 04013333 A EP04013333 A EP 04013333A EP 04013333 A EP04013333 A EP 04013333A EP 1484031 B1 EP1484031 B1 EP 1484031B1
Authority
EP
European Patent Office
Prior art keywords
muffle
ceramic
pressing
place
cross
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP04013333A
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German (de)
English (en)
Other versions
EP1484031A1 (fr
Inventor
Peter Kreuder
Martin Haizmann
Marcel Meegdes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Degudent GmbH
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Degudent GmbH
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Filing date
Publication date
Application filed by Degudent GmbH filed Critical Degudent GmbH
Publication of EP1484031A1 publication Critical patent/EP1484031A1/fr
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Publication of EP1484031B1 publication Critical patent/EP1484031B1/fr
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/20—Methods or devices for soldering, casting, moulding or melting

Definitions

  • the invention relates to a method for producing a dental ceramic structure by on, over and / or pressing structures of metal or ceramic in a muffle, comprising producing the muffle by filling a hardenable investment in a muffle base, a muffle ring sleeve and a muffle cover comprehensive device and subsequent removal of the hardened investment forming the muffle, wherein from the muffle base at least a placeholder emanates, is formed in the finished muffle a press channel with a cross section q, and then pressing at least one of existing ceramic ceramic pellet made of flowable ceramic a cross-section qk ⁇ q, in particular qk ⁇ q, by displacing a press ram in the at least one press channel to press the flowable ceramic over at least one runner from the press channel into a cavity of the muffle h corresponds to press ceramic to be created.
  • the invention relates to an apparatus for producing a dental ceramic structure by on, over or over pressing structures made of metal or ceramic in a muffle, comprising a Muffielringmanschette, a muffle cover, a ram and a muffle base from which at least one placeholder emanates , in which at least one press channel is formed in the finished muffle, in which the press ram for pressing flowable ceramic is displaceable, and wherein the at least one pressing channel has a cross section q, in the press channel at least one ceramic pellet of the flowable ceramic with a cross section qk qk ⁇ q, in particular qk ⁇ q, can be introduced and emanate from the sprue channels, which lead into at least one cavity in the muffle, in which the dental ceramic structure is formed.
  • a model made of wax or plastic is first formed by the object to be formed and connected via wax or plastic with a placeholder, which starts from a muffle base of a muffle system, with which a muffle is poured ,
  • a muffle base of a muffle system
  • muffle ring sleeve and muffle cover the placeholder with the model receiving interior is filled with an embedding and then cured.
  • the wax or plastic is melted out so that a cavity corresponding to the positive shape of the object to be produced is formed in the muffle.
  • the press channel formed by the placeholder corresponding to the ceramic to be pressed ceramic pellets are introduced together with a ram in a press furnace. After reaching the pressing temperature, the flowable ceramic material is printed by means of the press ram in the cavity.
  • a muffle system of the type mentioned is with the restriction of DE-A-102 41 857 to eninhmen than that the muffle ring is not closed with a muffle lid.
  • the muffle system comprises a plurality of placeholders, which are spaced from each other from a muffle base and z. B. held by a magnet.
  • the present invention is based on the object to be able to press ceramic to the desired extent, with recourse to commercial ceramic pellets.
  • the possibility should be given to be able to overpress wide-span, large dental prosthetic structures with ceramic material. It should be given a high stability for the ram when pressing the ceramic from the press channels.
  • the problem is solved by a method of the type mentioned in that the flowable ceramic is pressed over at least two over its entire length or almost entire length merging press channels, wherein in each press channel at least one ceramic pellet is introduced with a cross section qk and the Ceramic pellets are pressed with a ram with a cross-sectional geometry that corresponds to that of the merging press channels.
  • the number of pressing channels is selected such that it allows a receiving volume for pressing ceramic for a multi-unit bridge, in particular up to 14-membered bridge.
  • several smaller objects such as crowns, inlays, onlays or veneers can be produced in one pressing operation.
  • scaffolding large substructures are not provided by, for example, a Pulverschlicker Kunststoffer Kunststoffer Kunststoffer Kunststoffer Kunststoffer with ceramic layers, which makes a multi-layer application of the ceramic required, due to the shrinking occurring between the individual firing the Endkeramik not always shows the desired occlusion, but it is a contact, over or repressing carried out by means of a muffle system having at least two merging press channels, in which a desired number of ceramic pellets can be introduced and pressed together.
  • the required pressures are built up by conventional pressing devices, wherein the pressing channels and thus the pressing dies merge into each other, so that a high stability is given.
  • Crossover means that the press channels are connected to each other over their height or almost over their entire height.
  • a scaffold or other substructure is pressed with ceramics. Rather, ceramic components themselves can be produced by the process according to the invention. Preferably, however, bridges, crowns, veneers and inlays are pressed with ceramic.
  • the pressing channels are preferably equally filled with ceramic pellets, it goes without saying that it is also possible to fill the pressing channels differently or, if appropriate, to leave a pressing channel unfilled. In this case, the corresponding press channel must be closed in an extent that in these the flowable ceramic can not penetrate.
  • a device for producing a dental ceramic structure - also referred to as a dental ceramic molded article - of the type mentioned above is characterized in that at least two placeholders each having a cross-section q emanate from the muffle base and that the placeholders extend over their entire length or almost their entire length merge.
  • the cross-section of the muffle is larger than in conventional systems. Nevertheless, in order to determine the temperature in the vicinity of the cavity formed in the muffle, which is to be filled with the flowable ceramic, it is provided that the free space enclosed by the muffle base decreases in cross-section from the inner wall of the muffle ring sleeve.
  • the muffle base consists of an outer receiving ring for a base element, from which the placeholders emanate.
  • the base element is supported receiving ring side on a level.
  • the receiving ring muffelire should limit a trapezoidal in cross-section interior, along the central axis extend the placeholders.
  • the geometric design of the receiving ring thus results in a muffle geometry, which is frusto-conical in its press channel end portion, so that temperature sensors such as thermocouples can be brought close to the cavity to be filled with the ceramic material.
  • the base element has a receptacle for introducing a withdrawal element on the outside, in order to withdraw the base element in the axial direction of the muffle ring collar therefrom.
  • a Twisting the muffle base about its longitudinal axis is not required, which could otherwise damage the press channels.
  • the base element from which the placeholders emanate, consists in particular of an outer cylindrical first portion and a subsequent disk-shaped inner second portion of larger diameter, wherein the second portion is geometrically matched to the stage of the receiving ring.
  • a muffle mold 10 and a muffle system is shown in section, by means of which a muffle is produced in this cavity to be formed, is to be pressed into the flowable ceramic.
  • the muffle mold 10 consists of a muffle base 12, a muffle ring sleeve 14 - also called a muffle ring for short - and a muffle cover 16 with a filling opening 18 for a researcher bachelorde and to be cured Investment.
  • the muffle base 12 is in turn composed of an outer receiving ring 20 and a base 22 with outgoing from these placeholders 24.
  • the receiving ring 20 consists of a cylindrical base portion 26, which merges via a peripheral step 28 in an inner portion 30 which defines a trapezoidal in the upper part, ie trapezoidal interior 32.
  • the base portion 26 has a through opening 34 in which an outer portion 36 of the base member 22 extends, which merges into a disc-shaped inner portion 38 of larger diameter. Between the outer portion 36 and the inner portion 38 extends a step 40, which is then placed on a circumferential inner step 42 of the receiving ring 20 fit exactly when the base 22 is inserted into the receiving ring 20.
  • a total of four placeholders 46, 48, 50, 52 each having a cross-section q.
  • the placeholders 46, 48, 50, 52 extend into the trapezoidal inner space 32 surrounded on the one hand by the retaining ring 20 and, in the exemplary embodiment, in sections in the inner space 54 of the muffle shape 10 surrounded by the muffle ring collar 14.
  • the placeholders 46, 48, 50, 52 merge into one another over their entire length.
  • the pressing channels formed by the placeholders 46, 48, 50, 52 are not spaced apart from one another, but merge into one another, thus forming a common "pressing space”.
  • the interior 54 of the muffle mold 10 is filled via the opening 18 with an investment material.
  • the muffle mold is removed and the muffle thus prepared is heated so that the wax melt and flow out of the muffle can.
  • ceramic is then pressed in a known manner.
  • one of the number of ceramic pellets corresponding to the ceramic material to be compacted is introduced into the press channels formed by the spacers 46, 48, 50, 52 in the muffle, in order then to introduce the muffle with the ceramic pellets and a press ram 64 extending into the press channels into an oven to press the ceramic mass, after it has become fluid, in the cavities of the muffle.
  • the punch 64 - as the schematic diagram of FIG. 5 illustrates - the cross-sectional geometry of the press channels formed by the placeholders 46, 48, 50, 52 corresponding mating stamp sections 66, 68, 70, 72 to 64 by axial displacement of the ram towards the bottom of the press channels, the ceramic mass to press on the outgoing of the press channels runners in the framework surrounding the cavity.
  • the placeholders 46, 48, 50, 52 may optionally be formed as lost elements that are flexible to an extent that they can be removed by quasi squeezing out of the muffle.

Landscapes

  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Prosthetics (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Ceramic Products (AREA)
  • Dental Preparations (AREA)

Claims (12)

  1. Procédé de fabrication d'une structure dentaire en céramique, par pression contre, au-dessus et/ou autour de structures en métal ou en céramique dans un moufle, comprenant :
    - la fabrication du moufle en introduisant une masse de scellement pouvant être durcie, dans un dispositif (10) comprenant une base de moufle (12, 20, 22), une gaine annulaire de moufle (14) ainsi qu'un couvercle de moufle (16) et ensuite en retirant la masse de scellement durcie formant le moufle, alors qu'un pivot de place partant (46, 48, 50, 52)de la base de moufle, forme dans le moufle terminé un canal de pressage avec une section q, et
    - le pressage ultérieur d'au moins une pastille de céramique coulable de section qk ≤ q, particulièrement qk ≈ q, en poussant un poinçon de pressage dans l'au moins un canal de pressage afin de mouler par pression la céramique coulable par au moins un canal de coulée partant du canal de pressage dans une cavité du moufle qui correspond à un moule négatif de la céramique de pressage à fabriquer,
    caractérisé en ce que
    la céramique coulable est moulée par au moins deux canaux de pressage se raccordant l'un dans l'autre sur toute leur hauteur ou presque toute leur hauteur, en plaçant dans chaque canal de pressage au moins une pastille de céramique avec une section qk, et les pastilles de céramique sont moulées par pression avec un poinçon de pressage (64, 66, 68, 70, 72) dont la géométrie de section correspond à celle des canaux de pressage se raccordant l'un dans l'autre.
  2. Procédé selon la revendication 1,
    caractérisé en ce qu'
    on mesure la température dans la zone d'extrémité de forme tronconique formée du côté du canal de pressage du moufle.
  3. Procédé selon la revendication 1,
    caractérisé en ce que
    les canaux de pressage sont remplis avec un nombre de pastilles de céramique différent l'un de l'autre.
  4. Dispositif de fabrication d'une structure dentaire en céramique par une pression contre, au-dessus ou autour de structures en métal ou en céramique dans un moufle comprenant
    une gaine annulaire de moufle (14), un couvercle de moufle (16), un poinçon de pressage (64) ainsi qu'une base de moufle (12, 20, 22) de laquelle part au moins un pivot de place (46, 48, 50, 52), formant dans le moufle terminé au moins un canal de pressage, dans lequel le poinçon de pressage peut être poussé pour mouler par pression une céramique coulable, et dont au moins un canal de pression présente une section q, en introduisant au moins une pastille de céramique coulable de section qk avec qk ≤ q, particulièrement qk ≈ q dans le canal de pression, d'où partent des canaux de coulée qui conduisent dans au moins une cavité du moufle dans laquelle la structure dentaire en céramique est formée,
    caractérisé en ce que
    de la base de moufle (12, 20, 22) partent au moins deux pivots de place(46, 48, 50, 52) respectivement de section q, et les pivots de place se raccordent l'un dans l'autre sur toute leur longueur ou presque toute leur longueur.
  5. Dispositif selon la revendication 4,
    caractérisé en ce que
    la base de moufle (12) est composée d'un anneau de réception externe (20) recevant un élément de socle (22) d'où partent les pivots de place (46, 48, 50, 52).
  6. Dispositif selon la revendication 5,
    caractérisé en ce que
    l'élément de socle (22) s'appuie sur un épaulement (28) du côté interne de l'anneau de réception externe (20).
  7. Dispositif selon au moins la revendication 5,
    caractérisé en ce que
    l'élément de socle (22) présente du côté externe un logement pour un élément d'extraction servant à retirer l'élément de socle dans le sens axial du moufle.
  8. Dispositif selon au moins la revendication 5,
    caractérisé en ce que
    l'anneau de réception (20) délimite du côté du moufle une chambre intérieure (32) de section trapézoïdale, et les pivots de place (46, 48, 50, 52) s'étendent le long de l'axe central de cette chambre.
  9. Dispositif selon au moins l'une des revendications 5 à 7,
    caractérisé en ce que
    l'élément de socle (22) est composé d'une première section cylindrique externe (36) rattachée (38) à une deuxième section interne discoïdale, dont le diamètre est plus grand et adapté géométriquement à l'épaulement (28) de l'anneau de réception (20).
  10. Dispositif selon au moins la revendication 5,
    caractérisé en ce que
    n pivots de place(46, 48, 50, 52) partent de l'élément de socle (22), avec n > 2.
  11. Dispositif selon au moins la revendication 10,
    caractérisé en ce que
    quatre pivots de place (46, 48, 50, 52) partent de l'élément de socle (22).
  12. Dispositif selon au moins la revendication 4,
    caractérisé en ce que
    les pivots de place (46, 48, 50, 52) sont des éléments perdus.
EP04013333A 2003-06-06 2004-06-07 Procédé et dispositif pour la production d'une structure dentaire en céramique Expired - Lifetime EP1484031B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10325660 2003-06-06
DE10325660A DE10325660B4 (de) 2003-06-06 2003-06-06 Verfahren und Vorrichtung zur Herstellung einer dentalkeramischen Struktur

Publications (2)

Publication Number Publication Date
EP1484031A1 EP1484031A1 (fr) 2004-12-08
EP1484031B1 true EP1484031B1 (fr) 2007-08-01

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EP04013333A Expired - Lifetime EP1484031B1 (fr) 2003-06-06 2004-06-07 Procédé et dispositif pour la production d'une structure dentaire en céramique

Country Status (4)

Country Link
EP (1) EP1484031B1 (fr)
AT (1) ATE368427T1 (fr)
DE (2) DE10325660B4 (fr)
ES (1) ES2290589T3 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012111683A1 (de) 2012-11-30 2014-06-05 Degudent Gmbh Verfahren zum Herstellen von Zahnersatz
DE102013104561A1 (de) 2013-05-03 2014-11-06 Degudent Gmbh Verfahren zur Herstellung eines Rohlings sowie Rohling
WO2018065301A1 (fr) 2016-10-07 2018-04-12 Dentsply Sirona Inc. Vitrocéramique à base de silicate de lithium
WO2018162055A1 (fr) 2017-03-08 2018-09-13 Dentsply Sirona Inc. Procédé de production d'un corps à forme monolithique
US10138154B2 (en) 2015-05-21 2018-11-27 Dentsply Sirona Inc. Method for producing a dental prosthesis
US10537411B2 (en) 2017-03-08 2020-01-21 Dentsply Sirona Inc. Method to produce a monolithic form body

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202005003014U1 (de) 2005-02-24 2005-04-28 Dekema Dental-Keramiköfen GmbH Vorrichtung zur Herstellung von Muffeln für die Herstellung von Zahnersatzteilen
AT506255B1 (de) * 2007-11-05 2013-11-15 Ivoclar Vivadent Ag Muffel zur herstellung von zahnersatzteilen
US8257622B2 (en) 2007-11-05 2012-09-04 Ivoclar Vivadent Ag Muffle and method of using
DE102008017784B4 (de) 2008-04-08 2014-04-17 Ivoclar Vivadent Ag Vorrichtung zum Anfertigen einer Muffel
DE202008017072U1 (de) * 2008-12-24 2010-02-25 Zubler Gerätebau GmbH Pressmuffel und zu deren Herstellung dienendes Muffelsystem

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9001740U1 (de) * 1990-02-14 1990-04-19 Ivoclar Ag, Schaan Muffel
DE10037681B4 (de) * 2000-07-29 2007-08-16 Zubler Gerätebau GmbH Manschette
DE10136584A1 (de) * 2001-07-28 2003-02-13 Zubler Geraetebau Verfahren zur Herstellung von Preßkeramik in der Zahntechnik; Keramikpreßofen, Muffel und Muffellehre hierfür
DE10241857B4 (de) * 2001-10-02 2005-01-20 Michael Polz Verfahren und Vorrichtung zur Anfertigung einer Form, insbesondere einer Muffel, für die Herstellung von Zahnersatz-Objekten

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012111683A1 (de) 2012-11-30 2014-06-05 Degudent Gmbh Verfahren zum Herstellen von Zahnersatz
DE102013104561A1 (de) 2013-05-03 2014-11-06 Degudent Gmbh Verfahren zur Herstellung eines Rohlings sowie Rohling
EP3124010A1 (fr) 2013-05-03 2017-02-01 Dentsply Sirona Inc. Ébauche et son procédé de production
US10138154B2 (en) 2015-05-21 2018-11-27 Dentsply Sirona Inc. Method for producing a dental prosthesis
WO2018065301A1 (fr) 2016-10-07 2018-04-12 Dentsply Sirona Inc. Vitrocéramique à base de silicate de lithium
DE102016119108A1 (de) 2016-10-07 2018-04-12 Degudent Gmbh Lithiumsilikat-Glaskeramik
US11117829B2 (en) 2016-10-07 2021-09-14 Dentsply Sirona Inc. Lithium silicate glass ceramic
WO2018162055A1 (fr) 2017-03-08 2018-09-13 Dentsply Sirona Inc. Procédé de production d'un corps à forme monolithique
US10537411B2 (en) 2017-03-08 2020-01-21 Dentsply Sirona Inc. Method to produce a monolithic form body

Also Published As

Publication number Publication date
ES2290589T3 (es) 2008-02-16
ATE368427T1 (de) 2007-08-15
DE10325660A1 (de) 2005-01-05
EP1484031A1 (fr) 2004-12-08
DE10325660B4 (de) 2008-07-10
DE502004004487D1 (de) 2007-09-13

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